| Video resolution & frame rate (e.g. 1080p @ 30fps, or better) | Clearer video, important if you want to identify faces or details. |
| Night vision / IR LEDs | For recording in low light or dark environments. |
| Wide angle lens | To cover more area with one small camera. |
| Storage options (SD card) / cloud storage | To keep recordings; SD card lets you avoid ongoing subscription fees. |
| Battery life vs power source | Battery-only models are portable, but need recharging; wired ones can record 24/7 if plugged in. |
| WiFi / live stream / app control | If you want to see footage in real time remotely. |
| Motion detection & auto-record | Saves storage & battery by only recording when something changes. |
| Size & mounting / concealment options | Smaller size, or magnetic / clip mounting, etc. helps with discreet placement. |
| Build quality / durability / waterproofing (if outdoor) | To last longer, survive environmental challenges. |
